
import org.junit.BeforeClass;
import org.springframework.mock.web.MockServletContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.XmlWebApplicationContext;
import org.springframework.web.servlet.HandlerAdapter;
import org.springframework.web.servlet.HandlerExecutionChain;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter;
import org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
 * 说明： JUnit测试action时使用的基类
 */
public class JUnitActionBase {
    private static HandlerMapping handlerMapping;
    private static HandlerAdapter handlerAdapter;
    /**
     * 读取spring3 MVC配置文件
     */
    @BeforeClass
    public static void setUp() {
        if (handlerMapping == null) {
            String[] configs = { "file:resources/spring-mvc.xml" ,"file:resources/spring-hibernate.xml" ,"file:resources/spring.xml" };
            XmlWebApplicationContext context = new XmlWebApplicationContext();
            context.setConfigLocations(configs);
            MockServletContext msc = new MockServletContext();
            context.setServletContext(msc);
            context.refresh();
            msc.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, context);
            handlerMapping = (HandlerMapping)context .getBean(DefaultAnnotationHandlerMapping.class);
            handlerAdapter = (HandlerAdapter) context.getBean(context.getBeanNamesForType(AnnotationMethodHandlerAdapter.class)[0]);
        }
    }

    /**
     * 执行request对象请求的action
     *
     * @param request
     * @param response
     * @return
     * @throws Exception
     */
    public ModelAndView excuteAction(HttpServletRequest request, HttpServletResponse response)throws Exception {
        HandlerExecutionChain chain = handlerMapping.getHandler(request);
        final ModelAndView model = handlerAdapter.handle(request, response,chain.getHandler());
        return model;
    }
}
